Coal mine underground layered anti-vibration pump station mine car

Abstract

The utility model discloses a coal mine underground layered anti -seismic formula pump station mine car belongs to coal mine underground equipment technical field, including the frame, the top of frame is equipped with the control cabinet, hydraulic pump and high -power motor, and the bottom between control cabinet and frame is equipped with a plurality of first shock absorber, and the bottom between hydraulic pump and high -power motor and frame is equipped with a plurality of second shock absorber, and the both ends of hydraulic pump and high -power motor along mine car walking direction are equipped with third shock absorber respectively, the liquid suction line of hydraulic pump connects bellows, and the liquid outlet high -pressure line of hydraulic pump connects rubber tube, and the electrical interface of high -power motor connects rubber -covered flexible cable, and the outside of rubber -covered flexible cable is equipped with spiral protection sleeve pipe. The utility model can realize equipment layered multistage damping function, and adopts dynamic soft connection mode to promote equipment whole anti -seismic performance, reduces the failure incidence and maintenance frequency, guarantees the continuous stable operation of underground operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of underground coal mine equipment, specifically relating to a layered, earthquake-resistant pump station mine car for underground coal mines. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] The harsh underground working environment in coal mines, with uneven tunnel floors, causes mine cars to be subjected to continuous high-intensity, multi-frequency vibrations and impacts during transportation and operation. This is especially true for mine cars equipped with hydraulic pump stations, high-power motors, and electronic control systems. Hydraulic pump stations and high-power motors are high-vibration-source equipment, while electronic control systems, including PLCs, soft starters, and precision instruments, are extremely sensitive to vibration. Existing pump station mine cars have significant deficiencies in structural design and seismic protection, specifically: Currently, most common pump station mine cars adopt a rigid, integral structure, directly fixing high-power motors, pump bodies, and electrical control equipment to the car's floor. This lacks effective vibration isolation and layered damping design. This rigid connection leads to vibration coupling between the equipment and the mine car, with peak vibration acceleration from the underground roadway directly transmitted to the equipment itself. This easily causes solder joint cracking, circuit board breakage, or component detachment in precision electronic components, resulting in a high annual failure rate and seriously threatening the reliability of monitoring and control systems. Furthermore, due to the lack of layered damping mechanisms, equipment interferes with each other due to differences in vibration frequencies. The heavy weight of high-power motors, and the high-frequency vibrations they generate during start-up, shutdown, or operation, not only accelerate fatigue damage to their own mounting structure but also transmit the vibrations through the car body to the electrical control system, causing damage and poor operational stability. Using only a single damping measure cannot effectively reduce vibrations from equipment at different frequencies.

[0004] Regarding pipeline and cable connections, existing mining cars generally use rigid metal pipes or simple flexible hoses for connection, without considering the relative movement between the equipment and the car body. Under continuous vibration conditions, rigid pipe joints are prone to fatigue fracture due to stress concentration, leading to hydraulic medium leakage. This not only pollutes the environment but also poses safety hazards such as slipping and flammability. Cable connections also pose risks. Ordinary connectors are prone to loosening under vibration, leading to signal interruption or electrical short circuit, affecting safe production. Utility Model Content The purpose of this utility model is to provide a layered anti-vibration pump station mine car for underground coal mines, which can realize multi-level vibration reduction function of equipment layered layer, and adopt a dynamic soft connection method to improve the overall anti-vibration performance of the equipment, reduce the failure rate and maintenance frequency, and ensure the continuous and stable operation of underground operations.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: In a first aspect, an embodiment of this utility model provides a layered, earthquake-resistant pump station mine car for underground coal mines, including a frame. A control cabinet, a hydraulic pump, and a high-power motor are provided on the top of the frame. Several first shock absorbers are provided between the bottom of the control cabinet and the frame. Several second shock absorbers are provided between the bottom of the hydraulic pump and the high-power motor and the frame. Third shock absorbers are provided at both ends of the hydraulic pump and the high-power motor along the direction of travel of the mine car. The suction pipe of the hydraulic pump is connected to a corrugated pipe, the high-pressure discharge pipe of the hydraulic pump is connected to a rubber hose, and the electrical interface of the high-power motor is connected to a rubber-sheathed flexible cable. The rubber-sheathed flexible cable is provided with a spiral protective sleeve.

[0006] As a further technical solution, the first shock absorber is a bowl-shaped shock absorber; the second shock absorber is a disc-shaped spring shock absorber; and the third shock absorber is a shear-type high-elastic rubber shock absorber.

[0007] As a further technical solution, the bottom ends of the plurality of first shock absorbers are detachably mounted on the vehicle frame, and the top ends of the plurality of first shock absorbers are provided with a threaded connection structure to connect with the bottom of the control cabinet.

[0008] As a further technical solution, the control cabinet is configured as a rectangular structure, and the plurality of first shock absorbers are respectively located at the four corners of the bottom of the control cabinet.

[0009] As a further technical solution, the plurality of second shock absorbers are arranged on the frame at certain intervals along the bottom contour of the hydraulic pump and the high-power motor.

[0010] As a further technical solution, the bottom ends of the plurality of second shock absorbers are detachably mounted on the vehicle frame, and the top ends of the plurality of second shock absorbers are provided with threaded connection structures that connect to the bottom of the hydraulic pump and the high-power motor.

[0011] As a further technical solution, a second shock absorber is provided between the bottom of the bellows near the hydraulic pump and the vehicle frame. The bottom end of the second shock absorber is detachably mounted on the vehicle frame, and the top end of the second shock absorber is provided with a bracket that supports the bellows.

[0012] As a further technical solution, two third shock absorber mounting seats are provided on the frame at certain intervals along the direction of travel of the mine car. Two third shock absorbers are provided on the two third shock absorber mounting seats. A hydraulic pump and a high-power motor are provided between the two third shock absorbers. The shock absorption support direction of the two third shock absorbers is set parallel to the direction of travel of the mine car.

[0013] As a further technical solution, an anti-detachment clamp is provided at the connection position between the hydraulic pump's suction pipe and the bellows, and an anti-detachment clamp is also provided at the connection position between the hydraulic pump's high-pressure discharge pipe and the hose.

[0014] As a further technical solution, the bottom of the vehicle frame is equipped with wheels.

[0015] The beneficial effects of the above-described embodiments of this utility model are as follows: The present invention provides a layered shock-resistant pump station mine car for underground coal mines. By setting up a first shock absorber, a second shock absorber, and a third shock absorber in the coordinated arrangement of the control cabinet, hydraulic pump, and high-power motor installation positions, a multi-level, multi-directional three-dimensional shock absorption system is constructed. This system effectively isolates the equipment's own vibration from the complex impacts underground, significantly reduces the vibration transmitted to the precision components in the control cabinet, and fundamentally solves problems such as circuit board breakage and component detachment.

[0016] In addition, the use of corrugated pipes to connect the suction line and rubber hoses to connect the high-pressure discharge line, along with anti-detachment clamps, constitutes a reliable dynamic flexible connection system. This system can compensate for relative displacement caused by vibration, completely eliminating the risk of pipeline leakage and rupture caused by fatigue of rigid connections. Furthermore, the combined use of rubber-sheathed flexible cables and soft spiral protective sleeves ensures the reliability and durability of electrical connections in vibration environments. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a schematic diagram of the overall structure of a coal mine underground layered earthquake-resistant pump station mine car provided in Embodiment 1 of this utility model; Figure 2 This is a front view of a mine car for a layered, earthquake-resistant pumping station in an underground coal mine, as provided in Embodiment 1 of this utility model. Figure 3 This is a schematic diagram of the rear of a mine car for a layered, earthquake-resistant pumping station in an underground coal mine, provided in Embodiment 1 of this utility model. Figure 4 This is a schematic diagram of the structure of the vehicle body equipped with a first shock absorber, a second shock absorber, and a third shock absorber, as provided in Embodiment 1 of this utility model; Figure 5 This is a front view of the vehicle body equipped with a first shock absorber, a second shock absorber, and a third shock absorber, as provided in Embodiment 1 of this utility model; Figure 6 This is a top view of the vehicle body equipped with a first shock absorber, a second shock absorber, and a third shock absorber, as provided in Embodiment 1 of this utility model.

[0019] The diagram is for illustrative purposes only. The components include: 1. Chassis; 2. Control cabinet; 3. Hydraulic pump; 4. High-power motor; 5. Water pump; 6. Spiral protective sleeve; 7. Rubber hose; 8. Corrugated pipe; 9. First shock absorber; 10. Second shock absorber; 11. Third shock absorber; and 12. Wheels. Detailed Implementation

[0020] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1 In a typical embodiment of this utility model, such as Figures 1 to 6 As shown, a layered, earthquake-resistant pump station mine car for underground coal mines is provided, including a frame 1. The top of the frame 1 is equipped with a control cabinet 2, a hydraulic pump 3, and a high-power motor 4. Several first shock absorbers 9 are provided between the bottom of the control cabinet 2 and the frame 1. Several second shock absorbers 10 are provided between the bottom of the hydraulic pump 3 and the high-power motor 4 and the frame 1. Third shock absorbers 11 are provided at both ends of the hydraulic pump 3 and the high-power motor 4 along the direction of travel of the mine car. The suction pipe of the hydraulic pump 3 is connected to a corrugated pipe 8, the high-pressure discharge pipe of the hydraulic pump 3 is connected to a rubber hose 7, and the electrical interface of the high-power motor 4 is connected to a rubber-sheathed flexible cable. The rubber-sheathed flexible cable is provided with a spiral protective sleeve 6.

[0022] In this embodiment, in addition to the control cabinet 2, hydraulic pump 3, and high-power motor 4, the top of the frame 1 also houses a water pump 5. The control cabinet 2 contains electronic components. The hydraulic pump 3, high-power motor 4, and water pump 5 are prone to significant vibration during operation, which has a considerable impact on the electronic components inside the control cabinet 2. Therefore, vibration damping measures are required for the control cabinet 2, hydraulic pump 3, high-power motor 4, and water pump 5. The control cabinet 2 is relatively lightweight and generates a low vibration frequency, while the hydraulic pump 3, high-power motor 4, and water pump 5 are integrated on the frame 1, are heavier, and generate a higher vibration frequency. The vibration characteristics of the two are different. Furthermore, it is necessary to consider the forward and backward inertial swaying of the mine car during operation due to starting and braking. Therefore, anti-vibration structural measures are required for the control cabinet 2 and the hydraulic pump 3, high-power motor 4, and water pump 5.

[0023] The bottom of the control cabinet 2 is equipped with a first shock absorber 9, which can isolate vibrations from the frame 1 and provide protection for the precision electronic control components. The bottom of the hydraulic pump 3 and the high-power motor 4 is equipped with a second shock absorber 10, which is mainly used to absorb and attenuate the high-frequency vibrations generated by their own operation and prevent them from directly impacting the structure of the frame 1. A third shock absorber 11 is added at both ends of this vibration source along the direction of the mine car's travel, which constitutes a targeted lateral impact-resistant structure. The three work together to form a three-dimensional, multi-directional shock absorption and protection system, which effectively reduces the destructive force of the complex vibrations and impact loads of the mine car in the underground pump station on the equipment, significantly reduces the failure rate of electronic components in the control cabinet 2, and extends the service life of all equipment.

[0024] Secondly, the suction line of the hydraulic pump 3 is connected to the corrugated pipe 8. Utilizing the excellent expansion and contraction properties of the corrugated pipe 8, it can compensate for the relative displacement caused by vibration between the equipment and the frame 1, and between the equipment and external pipelines. This fundamentally avoids the risk of rigid connections breaking or leaking due to stress fatigue. The high-pressure discharge line is connected to the rubber hose 7, which is a mining high-pressure hose. Based on its flexibility, it can effectively buffer the impact of high-pressure fluid pulsation and structural vibration. For the electrical interfaces of high-power electrical equipment, rubber-sheathed flexible cables with an external spiral protective sleeve 6 are used. This combination not only ensures that the cable itself is not easily broken under repeated vibration, but its external spiral sheath also provides effective wear and compression resistance. Through the above dynamic flexible connection design, the leakage rate of the pipeline and the probability of cable connection failure are significantly reduced under continuous vibration conditions, greatly improving the safety and reliability of the system operation.

[0025] The first shock absorber 9 is a bowl-shaped shock absorber; the second shock absorber 10 is a disc-shaped spring shock absorber; and the third shock absorber 11 is a shear-type high-elastic rubber shock absorber.

[0026] This configuration optimizes the performance of each level of shock absorber, achieving precise attenuation of vibrations at different frequencies and directions. Among them, the bowl-shaped shock absorber typically has a low natural frequency and good damping characteristics. When used to support the control cabinet 2, it can effectively filter out the low-frequency, small-amplitude continuous vibrations generated by the mine car during its movement, as well as the influence of the hydraulic pump 3, high-power motor 4, and water pump 5. It also creates a relatively stable operating environment for the internal precision electronic components such as the PLC and soft starter.

[0027] The disc-shaped spring shock absorber has a high load-bearing capacity and can effectively reduce medium and high frequency vibrations. When applied to the bottom of the hydraulic pump 3 and the high-power motor 4, it can stably support these heavy equipment, while efficiently absorbing and isolating the strong medium and high frequency vibrations generated during their operation, preventing these vibration energy from being transmitted outward through the frame 1. This protects the structure of the frame 1 and avoids secondary vibration interference to the control cabinet 2.

[0028] When subjected to impact pressure perpendicular to the mounting surface, the shear-type high-elastic rubber shock absorber exhibits good elasticity. When placed at both ends of the hydraulic pump 3 and the high-power motor 4, its shear deformation working mode can efficiently absorb and dissipate the longitudinal and lateral impact energy generated by the mine car during travel and coupling, effectively suppressing the lateral sway of the entire upper equipment module, and forming an interlocking protection with the second shock absorber 10 at the bottom.

[0029] The bottom ends of the plurality of first shock absorbers 9 are detachably mounted on the vehicle frame 1, and the top ends of the plurality of first shock absorbers 9 are provided with threaded connection structures that connect to the bottom of the control cabinet 2.

[0030] The bottom of the first shock absorber 9 is detachably installed from the frame 1, facilitating quick assembly and positioning during mine car manufacturing or overhaul. The top is equipped with a threaded connection structure that connects to the bottom of the control cabinet 2. On the one hand, the threaded pair provides a stable and reliable fastening force, ensuring that the control cabinet 2 will not loosen from the shock absorber under vibration. On the other hand, this connection method allows for fine adjustment of the level of the control cabinet 2, and when a shock absorber needs to be replaced, the control cabinet 2 can be easily lifted and replaced individually without the need for large-scale disassembly of other components, greatly reducing maintenance time and costs.

[0031] The control cabinet 2 is configured as a rectangular structure, and the plurality of first shock absorbers 9 are respectively located at the four corners of the bottom of the control cabinet 2.

[0032] The rectangular structure of the control cabinet 2 facilitates reasonable layout and fixation on the limited mining car platform. The shock absorbers placed at its four corners provide a stable and reliable four-point support for the control cabinet 2, which can evenly distribute its weight, effectively avoid deformation of the cabinet due to uneven stress and reduce vibration.

[0033] The plurality of second shock absorbers 10 are arranged at certain intervals along the bottom contour of the hydraulic pump 3 and the high-power motor 4 on the frame 1.

[0034] By arranging the shock absorbers at intervals according to the bottom profile and weight distribution of the hydraulic pump 3 and the high-power motor 4, support blind spots or local stress concentration points can be avoided, ensuring that the weight and operating load of the equipment can be evenly transmitted to all the second shock absorbers 10, so that each shock absorber can give full play to its shock absorption performance, avoid premature failure due to local overload, and also prevent the equipment base from deforming due to long-term uneven stress, thus extending the service life of the equipment itself.

[0035] The bottom ends of the plurality of second shock absorbers 10 are detachably mounted on the vehicle frame 1, and the top ends of the plurality of second shock absorbers 10 are provided with threaded connection structures that connect to the bottom of the hydraulic pump 3 and the high-power motor 4.

[0036] The bottom end of the second shock absorber 10 is detachably mounted to the frame 1. Similarly, the threaded connection structure provides a strong preload to ensure that the equipment remains tightly connected to the second shock absorber 10 under strong vibration. At the same time, the feature that the bottom end of the second shock absorber 10 is detachably mounted to the frame 1 allows for precise adjustment of the height and level of the equipment during installation, ensuring the accuracy of the alignment of the transmission components. During maintenance, individual second shock absorbers 10 can be easily disassembled and replaced without affecting the entire equipment base, greatly improving the maintainability of the system.

[0037] A second shock absorber 10 is provided between the bottom of the bellows 8 near the hydraulic pump 3 and the frame 1. The bottom end of the second shock absorber 10 is detachably mounted on the frame 1, and the top end of the second shock absorber 10 is provided with a bracket, which supports the bellows 8.

[0038] The bellows 8 itself is flexible, but its connection joint with the hydraulic pump 3 is still a weak point. When the mine car vibrates, the suspended bellows 8 will swing, which can easily lead to fatigue damage of its end joint under long-term action. The bracket supports the side of the bellows 8 near the pump body, supporting part of the weight of the bellows 8 and reducing its sag. It can also absorb the vibration from the frame 1 and pipeline through the second shock absorber 10 inside, which greatly relieves the stress at the joint and effectively prevents the joint from loosening or the root of the bellows 8 from cracking due to repeated bending, further enhancing the reliability of the liquid suction pipeline system.

[0039] The frame 1 is provided with two third shock absorber 11 mounting seats at a certain distance along the direction of travel of the mine car. The two third shock absorber 11 mounting seats are provided with two third shock absorbers 11. A hydraulic pump 3 and a high-power motor 4 are provided between the two third shock absorbers 11. The shock absorption support direction of the two third shock absorbers 11 is parallel to the direction of travel of the mine car.

[0040] This configuration can precisely resist the longitudinal impact force generated when the mine car starts, brakes, or collides with other mine cars. When the impact occurs, the two third shock absorbers 11 effectively absorb and dissipate the impact energy through their shear deformation, converting the instantaneous impact force into elastic potential energy. This significantly reduces the impact load on the hydraulic pump 3, the high-power motor 4, and their mounting foundation, thus protecting the entire equipment module.

[0041] The hydraulic pump 3 has an anti-detachment clamp at the connection between its suction pipe and the corrugated pipe 8, and the hydraulic pump 3 also has an anti-detachment clamp at the connection between its high-pressure discharge pipe and the hose 7.

[0042] At flexible connections such as corrugated pipe 8 and hose 7, there is a risk of loosening at the pipe joint under continuous vibration. Anti-loosening clamps can firmly lock the connection, prevent the pipeline from completely detaching, and avoid serious safety accidents, environmental pollution and equipment shutdowns that may be caused by the instantaneous leakage of high-pressure hydraulic oil.

[0043] The frame 1 is equipped with wheels 12 at its bottom.

[0044] With this setup, the mine cars can be flexibly towed to different work locations according to the needs of underground coal production. Combined with the anti-vibration system, this reduces vibrations during transportation and operation, effectively improving equipment utilization.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mine car for a layered, earthquake-resistant pump station in an underground coal mine, characterized in that, The vehicle includes a frame, on the top of which is a control cabinet, a hydraulic pump, and a high-power motor. Several first shock absorbers are located between the bottom of the control cabinet and the frame. Several second shock absorbers are located between the bottom of the hydraulic pump and the high-power motor and the frame. Third shock absorbers are located at both ends of the hydraulic pump and the high-power motor along the direction of travel of the mine car. The suction pipe of the hydraulic pump is connected to a corrugated pipe, and the high-pressure discharge pipe of the hydraulic pump is connected to a rubber hose. The electrical interface of the high-power motor is connected to a rubber-sheathed flexible cable, and the rubber-sheathed flexible cable is covered with a spiral protective sleeve.

2. The mine car for a layered, earthquake-resistant pump station in an underground coal mine as described in claim 1, characterized in that, The first shock absorber is a bowl-shaped shock absorber; the second shock absorber is a disc-shaped spring shock absorber; and the third shock absorber is a shear-type high-elastic rubber shock absorber.

3. A mine car for a layered, earthquake-resistant pump station in an underground coal mine as described in claim 1, characterized in that, The bottom ends of the plurality of first shock absorbers are detachably mounted on the vehicle frame, and the top ends of the plurality of first shock absorbers are provided with a threaded connection structure that connects to the bottom of the control cabinet.

4. A mine car for a layered, earthquake-resistant pump station in an underground coal mine as described in claim 1, characterized in that, The control cabinet is configured as a rectangular structure, and the plurality of first shock absorbers are respectively located at the four corners of the bottom of the control cabinet.

5. The anti-shock pump station mine car of claim 1, wherein, The plurality of second shock absorbers are arranged at certain intervals along the bottom contour of the hydraulic pump and the high-power motor on the vehicle frame.

6. The anti-shock pump station mine car of sublevel in coal mine of claim 1, characterized in that, The bottom ends of the plurality of second shock absorbers are detachably mounted on the vehicle frame, and the top ends of the plurality of second shock absorbers are provided with threaded connection structures that connect to the bottom of the hydraulic pump and the high-power motor.

7. A mine car for a layered, earthquake-resistant pump station in an underground coal mine as described in claim 1, characterized in that, A second shock absorber is provided between the bottom of the bellows near the hydraulic pump and the vehicle frame. The bottom end of the second shock absorber is detachably mounted on the vehicle frame, and the top end of the second shock absorber is provided with a bracket that supports the bellows.

8. The anti-shock pump station mine car of claim 1, wherein, The frame is provided with two third shock absorber mounting seats at certain intervals along the direction of travel of the mine car. Two third shock absorbers are provided on the two third shock absorber mounting seats. A hydraulic pump and a high-power motor are provided between the two third shock absorbers. The shock absorption support direction of the two third shock absorbers is set parallel to the direction of travel of the mine car.

9. The anti-shock pump station mine car of claim 1, wherein, The hydraulic pump's suction pipe is equipped with an anti-detachment clamp at the connection point between the suction pipe and the corrugated pipe, and the hydraulic pump's high-pressure discharge pipe is also equipped with an anti-detachment clamp at the connection point between the discharge pipe and the hose.

10. The anti-shock pump station mine car of claim 1, wherein, The frame is equipped with wheels at the bottom.

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